Expansion-shield.



H. G'. OSBORNE.

EXPANSION SHIELD. APPLICATION' FILED JAN. 2e, 1910.

v 'HMHIlllllnmmlmm -iiiiirn` STATES PATENT oFFCE;

HENRY G. .OSSBOBNIL OYF BROOKLYN, 'NEW YORK.

l 'Exransrciv-SHIELD.

To all lwlw/n, may concern.:

Be it known that I,l HENRY G. OsoRNina citizen of the United States, anda resident of Brooklyn` in the county of Kings and Statev of NewYork,vhave invented certain new and useful Improvements inExpansion-Shields, of whichthe following is a specification.

My invention consists of an expansion shield for anchoring screws orbolts 1n holes `drilled into brick or stone.

The objects are, to provide a. one-piece shield which 'may be expandedthroughout its length', and to provideashield of this def `scriptionwhich may be secured in lplace sutiiciently firm before theinsertionofthe screw to prevent its `falling out or turning- While thescrew is being tightened,

y invention is fully disclosed in the V'ace companying drawing, inwhich:

.Figure 1 is a, plan'view of `niy'shield in its initial unfolded form;Fig.l 2is a sideview of the same; Fig. 3 is an'enlarged side I view,v ofthe shield in itsfo'lded forin ready for use; Fig. 4 is a. sectionalviewshowing the shield in a slabjand holding-a` .screw lfrom which anarm or other part`may be suspended.; Figa-5i is a side elevation of `theshield ready to be inserted -in a hole in* a slab, and Fig. 6 shows t-hesaine shield after it-has'been pushed linto a hole in a slab-and againstthe base wall or end `of the same to flatten -the integral linksconnecting the inner ends of the sides of" the shield and spread saidends to bind against the side walls of said hole.

The Shield -1 is composed of 'two semicylindricalsectionsQ, 2 joined at'their rear or inner ends by the` flexible links 3, 3 which arepreferably formed with the .Wedges 4,74

to enter the' space between theaces of the inner ends of the sections 2and cause them to separate.The flat faces of .the semiv'cylindricalsections 2, 2 'are recessed at 5, 5 said-recesses being tapered and alsobeing spil-ally recessed to correspond to sections of screw-threads.

In use the shield 1l after being folded to bring the recessed sides ofthe sections?, in facing relatilh isllnserted in a hole of properdiameter-and forced in until the links 3 contact with the bottom ofthe-hole and force the wedgest between the sedlions 2, 2 to spreadtheinner ends of said sections apart and forc'e them against the sidesof the hole.

' specincatiqn of Letters Patent.

other part. to be secured, -as usu'al.

'the hole.

'limited to the wedges 4.

The shield isA thus retained inplace. The

Patented July-1, 1913.

Application filed January 26, 1910. Serial No'. 540,129.

' insertion and tightening of the screw 7, in the chamber produced bylrecesses 5, o,

causes a further separationof thesections .1'

2, 2, producing ample A expansion of the shield to firmly secure thescrew. 'The screw fl' may be utilized to hold anaiin 8 or Owing to thetap'erfin recesses 5, 5 the expansion is greatest at the Iin'ner endwhich is desirable.

4Holes drilled to receive expansion shields are frequently made toolarge. My invention permits of using a screw of any sizev necessary toexpand the shield tightly 'in rlhis is a very valuable feature in aone-piece shield and is madepossible by th'parallel `expansionattainable with my invention.

In Fig. 4a slab is indicated having a hole, 10 receiving my shield,whichwill pret`- erably bein one integral piece` of lead. i

The invention is notV in every instance What I claim as my invention anddesire lto secure by Letters Patent., is:

AIV1. The combination shield-of the class described of' two semiin' anexpansion cylindricall sections taperingly recessed, said l,

'recesses being screw threaded, and the said sections being joinedtogether at their Ainn'er ends by two flexible links having wedgesformed on them adapted to sepa-rate the sec-A tionswhen the shield isforced against the bottom of the hole receiving said shield, the

two sections being adapted to be flirt-hei' and` positively separated'by 'the insertion of the.

screw in the recesses.

2. The combination in an 'expansion shield ofthe class described of twosections Y taperingly recessed, said sections vbeing joined together attheir inner ends by two tleniblel links having wedges formed on `themadapted` to separate the sections when the-shiel is forced against thebottom of the holereceiving said shield, the two sections being adaptedto be further and positive1y separated by the insertion of the screw 1nthe recesses. 3. The combination in an expansion shield of the classdescribed of two sections ta eringly recessed, said sections joined by aexible connection and means for expandin tho inner ends of said sections.in the' ho e p11-ier to the insertion ofthe screw.

4. e combination in ',an e. ansionr shield of the class described ofla puijalityil of sections taperingly recessed, .means-for ics .shield forthe purpose expandingr said sections in the hole prior to the insertionof the screw, the said sections adapted to be further expanded by theinsertion of a screw in the recesses.

5. The combination in an expansion specified of a plurality ofexpansihle members adapted to be expanded by a screw and means forexpanding the inner end of said shield independent of said screw.

(i. The combination willi an expansion shield adapted to be expanded bya screw of means to expund said shield at the inner end lndependenr ofsaid screw.

7. The combination, in an expansion shield for the purpose specified1 ofa plurality of sections forming a longitudinal recess, means forexpanding the inner ends of HENRY G. osBoRNE.

by the insertion of n Witnesses:

Aa'rnun MARION, HAS. C. Gru.. Y

Copies ot this patent may bo obtained for tivo cents each, by addressingthe "Commissioner of Patents. Washington, D. 0.

the said sections adapted to 20

